Talk about chutzpah. Juan Duran’s attack on his lawyer’s performance reminded U.S. District Judge Milton I. Shadur of the classic definition of that Yiddish word. In a written opinion, Shadur rejected the contention that the lawyer bungled Duran’s defense when he did not seek the dismissal of criminal charges on speedy-trial grounds. The lawyer would not have prevailed on the argument that federal authorities violated the Sixth Amendment by failing to search for Duran diligently enough during the …